package com.principle.facade;

public class Stereo {
    private static Stereo stereo=new Stereo();
    public static Stereo getInstance(){
        return stereo;
    }
    public void on(){
        System.out.println("sterro on");
    }
    public void off(){
        System.out.println("stereo off");
    }
    public void up(){
        System.out.println("stereo up...");
    }
}
